I am a a second CC owner, and I have a lot of issues.
Not receiving mail notice about member movements is the biggest pet peeve (1), the "member mailing error" is a different one.
(1) with a sad first anniversary some time ago
Alas, I've been offered the "sticky" option all the time, and the only real issue which I know in relation to owner change is that the former owner had to leave and re-enter to re-enable him to post in the CC forum.
IMHO, WGT gives away a lot of help potential by not informing their customers about changes intended and not asking how it works. Me thinks, their little business secrets have higher priority than trouble-free operation.
My 2 Pfennig, no pun intended.
Edit: One change to the better: Got my first tournament "don't forget to post score" mail in 10 months!